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Suppose that the probability of a baseball player getting a hit in at bat is 0.2807. If the player has 38 at-bats during a week, what's the probability that he gets greater than 9 hits?
Show how to get the answer using a Ti-84 calculator please, step by step.
In the following study, participants were randomly assigned to receive humanistic therapy, psychodynamic therapy, or behavioral therapy for their depression.
We measure the self esteem scores of a sample of statistics students, reasoning that this course may lower their self esteem relative to that of the typical college student (µ=55 and σ x =11.35) We obtain these scores:
find the 95 confidence interval for the variance of the heights of maple trees if a sample of 21 trees has a standard
The heights of adults in one town have a mean of 66.3 inches and a standard deviation of 3.3 inches. What can you conclude from Chebychev's theorem about the percentage of adults in the town whose heights are between 59.7 and 72.9 inches..
A hospital human resources manager finds that the local average starting salary for nurses is $24,000. She randomly samples 10 nurse's salaries at the hospital and calculates a mean of $23,450 and a standard deviation of $400.
Standard deviation of 0.7 inches. If 21 items is chosen at random, what is the probability that their mean length is less than 10.5 inches.
Florida State University administers a test of mathematics placement to students when they first enter the university.
Assuming that any newspaper left over has no value and that running short has no effect on any customer's tendency to return, determine the losses due to understockting and overstockting.
In 36 randomly selected seawater samples, the mean sodium chloride concentration was 23 cubic centimeters per cubic meter and the standard deviation was 6.7 cubic centimeters per cubic meter (cc/cm).
A researcher is conducting proportionate stratified random sampling with a sample size of 250. Approximately how many people should be sampled from each stratum?
you roll two fair dice a green one and a red one.a what is the probability of getting a sum of 6? enter your answer as
Determine the 90% confidence interval for average days worked by employees in all payroll departments?
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